Finding and Fixing Home Air Leaks

By Emilie Barton
Published on January 1, 1985
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A blower door is installed in one of a home's entries so that the building can be pressurized to find air leaks.
A blower door is installed in one of a home's entries so that the building can be pressurized to find air leaks.
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Instrumentation on the blower door allows the pressure to be adjusted inside the building.
Instrumentation on the blower door allows the pressure to be adjusted inside the building.
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The energy auditor searches out air leaks by checking likely spots with a smoke pencil.
The energy auditor searches out air leaks by checking likely spots with a smoke pencil.

When the temperature dropped and heating costs
jumped — two signs of fall — you decided to improve
the thermal performance of your home. So to button up your
house, you headed down to the hardware store to buy some of
those do-it-yourself weatherization kits that you’d seen
advertised so widely. You picked up storm windows, rolls of

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